San Francisco Zoo officials say they plan to reopen the facility Jan. 3, more than a week after a tiger escaped from its enclosure and mauled three people.
Officials said at a brief news conference Friday the zoo would be open to the public but did not say whether the tiger exhibit would also be open.
San Francisco police Chief Heather Fong also said Friday the criminal investigation into the attacks was wrapping up.
She said the investigation has determined there was no intentional release of the animal though she didn't elaborate on how it may have gotten out.
This comes as police and family say the last minutes of a 17-year-old boy's life were spent trying to save his friend from the tiger that was mauling him at the zoo, only to have the animal turn on him.
Carlos Sousa Jr. and his friend's brother desperately tried to distract the 350-pound Siberian tiger, but the big cat instead came after Sousa.
"He didn't run. He tried to help his friend, and it was him who ended up getting it the worst," the teen's father, Carlos Sousa Sr., said Thursday after meeting with police.
The heroic portrait of Sousa and a timeline of the dramatic Christmas Day attack emerged as officials revealed that the tiger's escape from its enclosure may have been aided by walls that were well below the height recommended by the accrediting agency for the nation's zoos.
San Francisco Zoo Director Manuel A. Mollinedo acknowledged that the wall around the animal's pen was just 12 1/2 feet high, after previously saying it was 18 feet. According to the Association of Zoos & Aquariums, the walls around a tiger exhibit should be at least 16.4 feet high.
Mollinedo said it was becoming increasingly clear the tiger leaped or climbed out, perhaps by grabbing onto a ledge. Investigators have ruled out the theory the tiger escaped through a door behind the exhibit at the zoo, which remained closed Friday.
"She had to have jumped," he said. "How she was able to jump that high is amazing to me."
Mollinedo said safety inspectors had examined the wall, built in 1940, and never raised any red flags about its size.
"When the AZA came out and inspected our zoo three years ago, they never noted that as a deficiency," he said. "Obviously now that something's happened, we're going to be revisiting the actual height."
The 4-year-old tiger, a female named Tatiana, went on a rampage near closing time Tuesday, killing Sousa and severely injuring the two others before police shot it to death.
Brothers Paul Dhaliwal, 19, and Kulbir Dhaliwal, 23, were at San Francisco General Hospital with severe bite and claw wounds. Their names were provided by hospital and law enforcement sources who spoke on condition of anonymity because the family had not yet given permission to release their names.
After interviewing the brothers, police said Kulbir Dhaliwal was the animal's first victim.
As the tiger clawed and bit him, Sousa and the younger brother yelled in hopes of scaring it off him, police said. The cat then went for Sousa, slashing his neck as the brothers ran to a zoo cafe for help.
After killing the teenager, the tiger followed a trail of blood left by Kulbir Dhaliwal about 300 yards to the cafe, where it mauled both men, police said.
Four officers who had already discovered Sousa's body then arrived and found the cat sitting next to one of the bloodied brothers, police Chief Fong said. The victim yelled, "Help me! Help me!" and the animal resumed its attack, Fong said.
The officers used their patrol car lights to distract the tiger, and it turned and began approaching them, leading all four to open fire, she said.
Police are still investigating how Tatiana was able to leave the enclosure.
At least one expert said the wall was low enough for the tiger to leap to the top.
Zoo officials said a "moat" separating the habitat from the public viewing area that measured 33 feet across contained no water, and has never had any. They did not address whether that affected the tiger's ability to get out.
"I think it could be feasible for a cat that has been taunted or angered," Jack Hanna, former director of the Columbus Zoo, said Thursday. "I don't think it would ever just do it to do it."
Police have not addressed whether the victims had teased the tiger.
On Thursday, Fong denied earlier reports that police were looking into the possibility that the victims had dangled a leg or other body part over the edge of the moat, after a shoe and blood was found inside the enclosure. No shoe was found inside, but a shoeprint was found on the railing of the fence surrounding the enclosure, and police are checking it against the shoes of the three victims, she said.
AZA spokesman Steven Feldman said the minimum recommended height of 16.4 feet is just a guideline and that a zoo could still be deemed safe even if its wall were lower.
Accreditation standards require "that the barriers be adequate to keep the animals and people apart from each other," Feldman said. "Obviously something happened to cause that not to be the case in this incident."
Many other U.S. zoos have significantly higher walls around their tigers.
Mollinedo said surveillance cameras and new fencing will be installed around the exhibit.